High mobility and high on/off ratio field-effect transistors based on chemical vapor deposited single-crystal MoS2 grains

Abstract

We report field-effect transistors (FETs) with single-crystal molybdenum disulfide (MoS2) channels synthesized by chemical vapor deposition (CVD). For a bilayer MoS2 FET, the mobility is ~17 cm2V-1s-1 and the on/off current ratio is ~108, which are much higher than those of FETs based on CVD polycrystalline MoS2 films. By avoiding the detrimental effects of the grain boundaries and the contamination introduced by the transfer process, the quality of the CVD MoS2 atomic layers deposited directly on SiO2 is comparable to the best exfoliated MoS2 flakes. It shows that CVD is a viable method to synthesize high quality MoS2 atomic layers.

13 pages, 4 figures

References in corpus (6)

• Anomalous Lattice Vibrations of Single and Few-Layer MoS2
• Synthesis of Large-Area MoS2 Atomic Layers with Chemical Vapor Deposition
• Integrated Circuits Based on Bilayer MoS2 Transistors
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• Graphene Segregated on Ni surfaces and Transferred to Insulators
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